<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>事件的基本使用</title>
    <!-- 引入vue -->
    <script type="text/javascript" src="../js/vue.js"></script>
</head>

<body>
    <!-- 

    -->
    <!-- 准备好一个容器 -->
    <div id="root">
        <!-- 遍历数组 -->
        <h2>人员列表</h2>
        <button @click="sortType=2">年龄升序</button>
        <button @click="sortType=1">年龄降序</button>
        <button @click="sortType=0">原顺序</button>
        <input type="text" placeholder="请输入文字" v-model="keyWord">
        <ul>
            <li v-for="(p,index) of filPersons" :key="index">
                {{p.name}}-{{p.age}}-{{p.sex}}
            </li>
        </ul>
    </div>
    <script type="text/javascript">
        Vue.config.productionTip = false;//阻止vue在启动时生成生产提示

        //用computed实现
        const vm = new Vue({
            el: "#root",
            data: {
                keyWord: "",
                sortType: 0,//0原顺序 1降序 2升序
                persons: [
                    { id: "001", name: "马冬梅", age: 19, sex: '女' },
                    { id: "002", name: "周冬雨", age: 20, sex: '女' },
                    { id: "003", name: "周杰伦", age: 21, sex: '男' },
                    { id: "004", name: "温兆伦", age: 22, sex: '男' },
                ],
            },
            computed: {
                filPersons() {
                    const arr = this.persons.filter((p) => {
                        return p.name.indexOf(this.keyWord) !== -1
                    });
                    //判断一下是否需要排序
                    if (this.sortType) {
                        arr.sort((p1, p2) => {
                            return this.sortType === 1 ? p2.age - p1.age : p1.age - p2.age
                        })
                    }
                    return arr
                }
            },
        })
    </script>
</body>

</html>